Draft-arm.



0. BAUR.

DRAFT ARM.

. 190B. 921 ,345. Patented May 11, 1909.

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0. BAUR. 7

DRAFT ABM.

APPLICATION FILED AUG. 3. 190 8. 921 ,345. Patented May 11,1909.

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OSCAR mun, or onioaeo, runners", ASSIGNOR T 'r 'EijLi um oARBoNICj COMPANY, or CHICAGO, iLL noIs- V j 1 "DRAFT-ARM. I

To all whom it may concern."

Be it known that I, OSCAR BAUR, a citizen of the United States, residing at Chicago, in invented new and useful Improvements in Draft-Arm s, fication.

This invention relates 'to that type of draft leakage. The operators of soda fountains are not, as a rule, skilled in mechanical matters and can not be depended u on to maintain a proper adjustment of t e furthermoreit is a more or less di cult matter to replace the valve disk when it is worn out.

My invention has for its object to relieve the valve mechanism of the draft arm from the pressure of the carbonated water when the arm is not in use and also to automatically admit the carbonated water to the valve mechanism of the draft arm when the handle of the draft arm is swung in the usual manner to discharge a coarse or a fine stream.

In the accompanying drawings illustrating one embodiment of the invention Figure 1 is a side elevation of the draft arm. Fig. 2 is a detail View of the tumbler. Fig. 3 is a detail view of the valve disk. Fig. 4 is a detail valve head. Fig. 5 1s a sectional view on the line 55 of Fig. 1. Fig. 6 is a detail view of the cam device. Fig. 7 is a side elevation artly in section of the tumbler and its shank. ig. 8 is a sectional view on the line 88 of Fig. 5. Fig. 9 is a detail view of the discharge end of the head, the nozzles being removed.

For the purpose of this application I have illustrated my invention in a type of draft arm which has been used for some time and which comprises a head 10 provided with a shank 11 adapted to be connected to the source of supply of carbonated water.

. valve disk 12 18 arranged in a seat side of the head said disk and is adapted to be moved circularly thereon. This tumbler fits in a ring 15 which is secured in the head and a cheek plate 16 is screwed on the ring 15 against the of which the following is a specipressure is constantly exerted on the valve arts and.

view showing the seat for the disk in the Specification of Letters Patent. Application filed Au ust a, 1908. Serial No. 446,512.

g and circular at 17 the county of Cook and State of Illinois, have 5 Patented May 11, 1909.

side of the head. The shank 17 (Fig. 7) of the tumbler 14 is made rectangular at 17 and it has'a tongue and groove connection at 18 with the tumbler to enable' the tumbler to be adjusted relative to the shank. An adjusting screw 19 operates in a longitudinal opening in the shank and bearsupon the tumbler to adjust the'same. A cheek plate 20 is secured against the oppo site side of the headby a bolt 21 which isv screwed into a socket in the head. A bifurcated handle 22 has one end provided with a rectangular opening 22 to receive the rectangular part 17 of the shank 17 and its other end provided receive the circular bolt 21. the handle is held in The end 22" of place on the shank 17 against the cheek plate 16 by a nut 23 screwthreaded on the end of the shank, and the end 22 of the handle is held in place on the bolt 21 against the cheek plate 20 by the head 21' of the bolt. The head is provided with a horizontal fluid passage 24 which communicates with the fluid passage ll in the shank 1'1 and with a lateral passage 24 at or about the middle of the head. The tumbler 14 has an inlet port 25 and an outlet'port 26 and these ports are connected by a passage 27 in the tumbler (Fig. 2).' The head has a downward extension 10 in which'are located a single passage 28 for the fine stream and two passages 29 for the coarse stream, the latter passages opening at the lower end of the extension on opposite sides of the fine stream passage 28 (Fig. 8). All of these passages are diagonally arranged and the fine stream passage 28 has a lateral extension 28 at its upper end and the coarse stream passages 29 0th connect with a lateral passage 29 at their upper end. The lateral passages 24, 28 and 29 open in the seat 13 at the side of the head (Fig. 4). The valve disk 12 is provided with a port 24 which registers with the passage 24 and the port 25 in the tumbler. The valve disk is also provided with ports 28" and 29 (Fig. 3) to register with the lateral passages 28 and 29, respectively, and the outlet port 26 of the tumbler is of the ports and 29 as the tumbler is turned in one Normally the port 26 of the tumbler is located midway between the ports 28 and 29" and is closed by the valve disk. A small nozzle 30 is located at the discharge end of the fine stream passage with a circular opening 22 to the'coarsestream is discharged from the two passages 29.

The draft arm thus far described has been madebefore and in practice the tumbler is turned by moving the handle backward or forward to register the outlet port 26 of the tumbler with the fine stream ort 28" or the coarse stream ort 29" in t e valve disk thereby to obtain the discharge of a fine or a coarsestream. But it will be observed that the fluid pressure is constantly exerted on the valve disk through the passages 11, 24, 24, ports 24 and 25, passage 27 and port 26 when the draft arm is not being used and in order to prevent leakage it is necessary to keep the tumbler adjusted to tightly seat against the valve disk. If the tumbler is seated too tightly the handle will operate hard and it is desirable to make the handle operate easily. Furthermore, it will be readily understood that these conditions necessitate frequent adjustment of the tumbler and that the valve disk is subjected to excessive wear.

I have provided a simple means for relieving the valve mechanism of the draft arm as thus far described of the ressure of the carbonated water when the c raft arm is not being used and this means comprises a valve 32 arranged to engage a seat 32 at the inlet end of the passage 24 in the head (Fig. 5). This valve 32 is carried by a stem 33 which extends through the head and is provided at its outer end with a cap 34 projecting beyond the head. The cap works in a sleeve 35 closed at its inner end and screw-threaded in a socket 36 in the head. A spring 37 is arranged in the sleeve between its closed end 35 and the cap 34 to hold the valve 32 normally seated. A washer 38 is located in the socket 36 behind the sleeve 35. is carried by the ends 22, 22" ofthe handle 22 and is referably made integral with the handle. his oke extends across the front of the head an is provided with cams 40, 41 to engage the cap 34.

In practice the handle is normally in u i the valve 32 is seated by t e right position, spring 37 and the ca 34 is projected forward against the yoke. bus the passage 24 is closed against the pressure of the carbonated A yoke 39 water in the passage 11' and thereby the valve disk 12 is relieved of the pressure of the carbonated water. to draw some water the handle is swung backward or forward accordin ly as a fine or a coarse stream is re uired and as the handle is swung to register t e port 26 with port 28" or port 29" the cam 40 or the cam 41 will enga e the ca 34 and push it in to unseat the va ve 32. his will open the passage 24 conjointly with the registering of port 26 with port 28 or port 29" and ermit the carbonated water to flow throug 1 the passages and ports as heretofore described.

M invention is of sim le character and it can e readily embodied in draft arms of dif-' ferent forms without substantial change or modification thereof. The valve 32 thus becomes the main inlet valve of the draft-arm and it is operated automatically as the handle is swung and in the construction herein illustrated and described it is self adjusting.

What I claim and desire to secure by Letters Patent is:

'1. A soda fountain draft arm comprising a head having a fluid inlet passage and fluid outlet passages therein, means for controlli-ng the flow of fluid from the inlet to the outlet passages, a valve in said inlet passage, a stem carrying said valve, a cap on the stem outside of the head, a spring 0 crating to normally seat said valve, a han e for operating said means, a yoke on the handle, and a double cam on the yoke to engage said cap and unseat the valve.

2. A soda fountain draft arm comprising a head having a fluid inlet assage and fluid outlet passages, a circulary movable tumbler having a passage therein, one end of said tumbler passage being arranged to register with the inlet passage and the other end being adapted to register with either of the outlet passages, a handle for operating the tumbler, a valve in said inlet passage, a spring operating to normally seat said valve, a stem connected to said valve, and means operated by the handle to engage said stern and unseat the valve when the handle is operated to register the tumbler passage with an-outlet passage.

OSCAR BAUR.

Witnesses:

G. E. WALKER, WM. STERRETT.

When it is desired 

